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When This Indicator:
NODE PASS
On Green
HOST FAULT
On Red
NODE TEST
On Yellow
ACTIVITY SAT
On Yellow
ACTIVITY NORMAL
On Green
READY
On Green
TRANSMIT
On Yellow
RECEIVE
On Yellow
MAC FAULT
On Yellow
MAC TEST
On Yellow
EXIT COMPLETE
On Yellow
IN RING
On Green
SEEKING MEM
On Yellow
Off
DUP ADDR
On Red
REDUN WARN
On Yellow
PORT READY
On Green
SIG QUAL
On Green
On Red
TAP FAIL
On Red
EXTENDED TAP
On Yellow
CONFIG
AC POWER ON
On Orange
DC POWER ON
On Green
Is:
The host and MAC boards performed and passed self diagnostic tests.
The host board has either (1) failed the self diagnostic test or (2) faulted while in operation.
The host and MAC boards are performing self diagnostic tests.
The node has reached the peak of its ability to process messages.
These three indicators show the relative amount of processing taking place at the interface. If
all three indicators are ON, the amount of processing is high; if just one indicator is ON, the
amount of processing is low.
The RS 422/449 port of the interface is physically ready for transmitting and receiving
messages.
The interface is sending transmissions to the synchronous device.
The interface is receiving transmissions from the synchronous device.
The MAC board has either (1) failed the self diagnostic test or (2) faulted while in operation.
The MAC board is performing a self diagnostic test.
This node has left the logical ring of the Data Highway II link.
This node is a member of the logical ring on the Data Highway II link.
This node is trying to become a member of the logical ring or trying to build a logical ring in
the case that a ring does not already exist.
This node is not a member of a logical ring and is not seeking membership.
Another node has the same address on the Data Highway II link. This condition also places
this node into the disconnect state and turns on the MAC FAULT indicator.
A valid signal is being received at only one of the two Data Highway II ports.
This indicator is only on the redundant interface.
The on board relay connecting the MAC board to the dropline is closed.
A valid signal is being received at this Data Highway II port.
No signal or an invalid signal is being received at this Data Highway II port.
The extended tap has failed, its dropline connection to the port has opened, or the switch on
the MAC board is set for extended tap with a local tap connection.
This indicator can only go ON if the switch on the MAC board is set for extended tap.
The switch on the MAC board is set for the interface to connect to an extended tap.
The interface is receiving AC power through the fuse and the AC power switch.
The power supply board is generating DC power within specification.
Chapter 5
Operation and Troubleshooting
Then:
5 3
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Table of Contents
Troubleshooting
